kopia lustrzana https://github.com/espressif/esp-idf
84 wiersze
2.8 KiB
Markdown
84 wiersze
2.8 KiB
Markdown
|
# esp_lcd Driver Design
|
||
|
|
|
||
|
|
## Class Diagram
|
||
|
|
|
||
|
|
`esp_lcd` driver focuses on two parts: panel driver and IO driver. The panel driver is a bunch of operations on the **frame-buffer**, no matter where the frame-buffer is located. The IO driver is mainly consumed by the controller-based LCD panel drivers (e.g. ST7789). Usually such LCD controller can support various IO interfaces (e.g. I80, SPI, I2C, etc). So we define an abstract interface for the IO driver.
|
||
|
|
|
||
|
|
```mermaid
|
||
|
|
classDiagram
|
||
|
|
class esp_lcd_panel_t {
|
||
|
|
<<interface>>
|
||
|
|
+reset() esp_err_t
|
||
|
|
+init() esp_err_t
|
||
|
|
+draw_bitmap(int x_start, int y_start, int x_end, int y_end, const void *color_data) esp_err_t
|
||
|
|
+mirror(bool x_axis, bool y_axis) esp_err_t
|
||
|
|
+swap_xy(bool swap_axes) esp_err_t
|
||
|
|
+set_gap(int x_gap, int y_gap) esp_err_t
|
||
|
|
+invert_color(bool invert_color_data) esp_err_t
|
||
|
|
+disp_on_off(bool on_off) esp_err_t
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_lcd_rgb_panel_t --|> esp_lcd_panel_t : Inheritance
|
||
|
|
class esp_lcd_rgb_panel_t {
|
||
|
|
-int panel_id
|
||
|
|
-size_t data_width
|
||
|
|
-int disp_gpio
|
||
|
|
-intr_handle_t intr
|
||
|
|
-uint8_t* frame_buffer
|
||
|
|
-gdma_channel_handle_t gdma_channel
|
||
|
|
-dma_descriptor_t* dma_nodes
|
||
|
|
-on_vsync(void* user_data) bool
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_lcd_panel_model_t --|> esp_lcd_panel_t : Inheritance
|
||
|
|
esp_lcd_panel_model_t "1" --> "1" esp_lcd_panel_io_t : Use
|
||
|
|
class esp_lcd_panel_model_t {
|
||
|
|
-esp_lcd_panel_io_t* io
|
||
|
|
-int reset_gpio_num
|
||
|
|
}
|
||
|
|
|
||
|
|
class esp_lcd_panel_io_t {
|
||
|
|
<<interface>>
|
||
|
|
+rx_param(int lcd_cmd, void *param, size_t param_size)
|
||
|
|
+tx_param(int lcd_cmd, const void *param, size_t param_size)
|
||
|
|
+tx_color(int lcd_cmd, const void *color, size_t color_size)
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_lcd_panel_io_i2c_t --|> esp_lcd_panel_io_t : Inheritance
|
||
|
|
class esp_lcd_panel_io_i2c_t {
|
||
|
|
-int i2c_bus_id
|
||
|
|
-int ctrl_phase_cmd
|
||
|
|
-int ctrl_phase_data
|
||
|
|
-on_color_trans_done(void* user_data) bool
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_lcd_panel_io_spi_t --|> esp_lcd_panel_io_t : Inheritance
|
||
|
|
class esp_lcd_panel_io_spi_t {
|
||
|
|
-spi_device_handle_t spi_dev
|
||
|
|
-int dc_gpio_num
|
||
|
|
-spi_transaction_t trans_worker
|
||
|
|
-on_color_trans_done(void* user_data) bool
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_lcd_panel_io_i80_t --|> esp_lcd_panel_io_t : Inheritance
|
||
|
|
class esp_lcd_panel_io_i80_t {
|
||
|
|
-esp_lcd_i80_bus_t* bus
|
||
|
|
-int cs_gpio_num
|
||
|
|
-int dc_level
|
||
|
|
-size_t pclk_hz
|
||
|
|
-QueueHandle_t trans_queue
|
||
|
|
-QueueHandle_t done_queue
|
||
|
|
-on_color_trans_done(void* user_data) bool
|
||
|
|
}
|
||
|
|
|
||
|
|
esp_lcd_i80_bus_t "1" --> "1..*" esp_lcd_panel_io_i80_t : Has
|
||
|
|
class esp_lcd_i80_bus_t {
|
||
|
|
-int bus_id
|
||
|
|
-size_t data_width
|
||
|
|
-intr_handle_t intr
|
||
|
|
-gdma_cannel_handle_t dma_chan
|
||
|
|
-dma_descriptor_t* dma_nodes
|
||
|
|
-list_t i80_devices
|
||
|
|
}
|
||
|
|
```
|